"Not Funny" is the ninth episode in the twentieth season of the American animated television series South Park.
As global panic over Troll Trace causes a large crowd to gather outside the barricaded SpaceX facility in hopes of escaping to Mars, Cartman confronts Butters over his advances on Heidi Turner.
An increasingly panicked Cartman repeatedly asks Heidi to tell more jokes, but she concentrates fully on using her "emoji analysis" technique to solve the problems required to launch a Mars rocket.
After being caught and brought back home by their mother Sheila, Kyle and Ike decide to rally a panicking South Park to take vengeance on Troll Trace.
Jesse Schedeen of IGN gave the episode an 8.6 out of 10, saying "South Park's 20th season delivered another winner, as the show went on the offensive against President Garrison.